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Distal Humerus ORIF

Distal humerus ORIF — intra-articular bicolumnar fracture fixation — FRCS/FRACS exam preparation

Core Procedure
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High-yield overview

Posterior approach with olecranon chevron osteotomy for articular access; bicolumnar plating with two 3.5mm reconstruction plates; ulnar nerve identification and anterior transposition mandatory throughout | Advanced trauma procedure

Surgical Imaging

Six-panel composite showing pre-op AP and lateral X-rays, intraoperative views, and post-op radiographs of distal humerus ORIF
Distal humerus ORIF case series: (top) pre-operative AP and lateral radiographs showing intra-articular distal humerus fracture with condylar comminution; (middle) intraoperative views via olecranon osteotomy approach; (bottom) post-operative AP and lateral X-rays confirming anatomical articular reduction with parallel dual-column plating.Credit: Koh KH et al., J Shoulder Elbow Surg 2011 (PMC3087222) — CC BY-NC 3.0
Intraoperative photograph of distal humerus dissection showing retracted tissue and exposed bone
Intraoperative dissection during distal humerus ORIF: posterior approach with retraction of soft tissues exposing the distal humerus fracture fragments. Careful handling of the ulnar nerve (mobilised anteriorly) and posterior interosseous vessels is essential during this exposure.Credit: Chemama B et al., Orthop Traumatol Surg Res 2011 (PMC3058185) — CC BY-NC-ND

Critical Danger Structures — 5 Key Zones

Danger Zone 1: Ulnar Nerve

Location: Runs in the cubital tunnel posterior to the medial epicondyle; enters the forearm between the two heads of flexor carpi ulnaris 3–4 cm distal to the epicondyle. Lies immediately posterior to the medial column.

Protection: Identify the nerve at the very start of dissection before any retraction or drilling. Mobilise 8–10 cm proximally and 5 cm distally. Protect with a vessel loop throughout. Transpose anteriorly (subcutaneous or submuscular) at closure — failure to transpose risks post-operative cubital tunnel syndrome from scarring and implant proximity.

Danger Zone 2: Radial Nerve

Location: Radial nerve pierces the lateral intermuscular septum approximately 10 cm proximal to the lateral epicondyle and lies anterior to brachialis and brachioradialis. At risk with excessive proximal dissection on the lateral column.

Protection: Limit lateral dissection to the lateral epicondyle and distal humerus. Do not extend the posterior incision proximal to 10 cm above the joint without identifying the nerve. Use blunt proximal retraction only.

Danger Zone 3: Brachial Artery and Median Nerve

Location: Anterior to the distal humerus in the antecubital fossa; median nerve lies medial to the brachial artery. Both structures lie deep to the bicipital aponeurosis. At risk with severe anterior fracture displacement or anterior capsule dissection.

Protection: Assess neurovascular status pre-operatively and document. With high-energy fractures, anterior displacement may stretch or tether these structures. Elevate brachialis subperiosteally from lateral to medial if anterior capsule must be released. Check radial pulse after retractor placement.

Danger Zone 4: Olecranon Osteotomy Complications

Location: Olecranon osteotomy site at the bare area of the trochlear notch (the narrowest cartilage-free zone, 2 cm from the olecranon tip). Incorrect technique risks non-union, prominent hardware, and malunion step-off.

Protection: Chevron osteotomy at 70 degrees is most stable — V-shape apex pointing distally. Pre-drill and insert K-wire guide before oscillating saw to ensure anatomic reattachment. Use tension band wire or 6.5 mm cancellous screw with tension band for secure reattachment. Confirm anatomic reduction fluoroscopically before accepting fixation.

Danger Zone 5: Heterotopic Ossification

Location: Posterior capsule, brachialis muscle belly, and fracture haematoma are the commonest sites. Incidence 10–20% following distal humerus ORIF; higher with concurrent head injury, burns, or delayed surgery.

Protection: Prophylaxis with indomethacin 25 mg three times daily for 6 weeks (NSAID inhibits osteoblast differentiation). Start within 24–48 hours post-operatively. Avoid in renal impairment — single-dose radiotherapy (7 Gy) is an alternative. Early active mobilisation from day 1–2 is critical; prolonged immobilisation promotes ectopic bone formation.

Mnemonic

AO-CAO-C — Distal Humerus Classification

Mnemonic

BOLTBOLT — Bicolumnar Fixation Principles

Indications for Surgical Fixation

AO/OTA Classification

Distal humerus fractures are classified by the AO/OTA system:

  • A-type (Extra-articular): Metaphyseal fractures not involving the articular surface — ORIF with posterior plating but bicolumnar technique not mandatory
  • B-type (Partial articular): One column involved — lateral (B1), medial (B2), or shear/capitellar (B3) — single-column or buttress plating
  • C-type (Complete articular): Articular surface completely separated from the diaphysis:
    • C1: Simple articular + simple metaphyseal
    • C2: Simple articular + complex metaphyseal
    • C3: Multi-fragment articular (comminuted) — most challenging, may warrant primary TER in elderly

Surgical Indications

Absolute indications:

  • All AO C-type intra-articular fractures in physiologically active patients
  • Open fractures (urgent debridement and stabilisation)
  • Associated neurovascular injury (brachial artery, ulnar nerve)
  • Fracture-dislocation of the elbow

Relative indications:

  • B-type fractures with displacement greater than 2 mm articular step-off
  • Elderly patients — individualised decision (ORIF vs TER, see below)

ORIF vs Total Elbow Replacement in Elderly Patients

In patients older than 65 years with C3 fractures, primary TER is a validated alternative to ORIF:

Cobb and Morrey (J Bone Joint Surg Am, 1997)

  • 20 consecutive patients (21 elbows), mean age 72, primary TER for acute comminuted distal humerus fractures (9 patients had rheumatoid arthritis)
  • 15 excellent and 5 good results on the Mayo Elbow Performance Score (no fair or poor), mean arc 25 to 130 degrees, at mean 3.3 years
  • First established primary TER as a valid option for unreconstructable fractures in older patients; explicitly NOT an alternative to ORIF in younger patients

McKee MD et al. (J Shoulder Elbow Surg, 2009)

  • Multicentre prospective RCT: ORIF versus primary semiconstrained TER in patients older than 65 with displaced intra-articular (OTA 13C) distal humerus fractures; 42 randomised
  • 5 of 21 (24%) randomised to ORIF were converted to TER intraoperatively because stable fixation could not be achieved (analysed on-treatment)
  • TER produced significantly better Mayo Elbow Performance Scores at 3 months, 6 months, 12 months and 2 years (86 vs 73 at 2 years); DASH was better short-term but not significantly different at 2 years
  • Reoperation rate 4 of 15 (27%) for ORIF versus 3 of 25 (12%) for TER — NOT statistically significant (P = .2)
  • Conclusion: TER is a preferred alternative to ORIF in elderly patients with complex fractures not amenable to stable fixation

Pajarinen J and Bjorkenheim JM (J Shoulder Elbow Surg, 2002)

  • Series of 18 patients with AO type C intercondylar distal humerus fractures managed with ORIF, mean 2-year follow-up
  • Satisfactory outcomes achievable with bicolumnar plating but technically demanding; emphasised the olecranon osteotomy approach for articular exposure

Perpendicular (Orthogonal) vs Parallel Plating

Schemitsch EH, Tencer AF, Henley MB (J Orthop Trauma, 1994)

  • Cadaver biomechanical study of five plate configurations
  • With cortical contact, two plates placed medial-and-lateral OR at 90 degrees gave equivalent rigidity
  • Key principle: two-plate constructs do NOT require 90-degree orientation, but DO require placement on separate bony columns and different surfaces

Sanchez-Sotelo J, Torchia ME, O'Driscoll SW (J Bone Joint Surg Am, 2007)

  • Landmark clinical series of 34 complex distal humeral fractures (26 were AO C3) fixed with a principle-based parallel-plate technique (two plates in the sagittal plane)
  • Union in 31 of 32 followed fractures; no hardware failure; mean MEPS 85; mean flexion-extension arc 99 degrees
  • Established the modern parallel-plating principle: maximise screw fixation in the distal articular fragments and make each distal screw contribute to supracondylar stability

Zalavras CG et al. (J Shoulder Elbow Surg, 2011)

  • Cadaver biomechanical study (14 matched pairs) of parallel versus orthogonal plating with a metaphyseal defect
  • Parallel constructs significantly stiffer in varus cyclic loading (P = .002) and higher ultimate torque/load to failure; screw loosening occurred in all posterior plates of orthogonal constructs but none of the parallel constructs
  • Supports parallel plating as biomechanically advantageous, especially with metaphyseal comminution; both remain clinically acceptable and choice depends on fracture pattern and surgeon preference

Clinical Viva Scenarios

Use these scenarios to practise clinical reasoning and management decisions

CLINICAL SCENARIOAdvanced

CLINICAL PROMPT

"A 30-year-old right-hand-dominant carpenter falls from a ladder and sustains an AO C3 distal humerus fracture. Describe your positioning, approach, and fixation strategy."

PRACTICAL APPROACH
This is a complex intra-articular fracture in a young, high-demand patient where anatomic reduction and rigid fixation are critical. I would position the patient in the lateral decubitus position with the operative arm draped free over a padded bolster, allowing full posterior access and intraoperative fluoroscopy. Tourniquet at 250–300 mmHg. I use a straight posterior midline incision from 10 cm proximal to the olecranon tip to 4–5 cm distal. The very first step after raising skin flaps is to identify and vessel-loop the ulnar nerve posterior to the medial epicondyle — I mobilise it 8–10 cm proximally and 5–6 cm distally before any drilling or plating. For a C3 fracture I use an olecranon chevron osteotomy for maximal articular exposure: I identify the bare area of the trochlear notch, pre-drill guide K-wires, mark the 70-degree chevron cut with electrocautery, and complete it with a saw and narrow osteotome. The entire distal humerus articular surface is now visible. I reassemble the comminuted articular surface anatomically — trochlea first, then capitellum — using lag screws (2.0–2.7 mm Herbert or cancellous), confirming articular congruity on fluoroscopy before commencing column plating. I then apply two 3.5 mm reconstruction plates in a perpendicular or parallel configuration: one to the posterior medial column extending to the medial epicondyle with at least two distal screws in the articular block, and one to the lateral column. Each plate requires at least three bicortical shaft screws proximally. Distal screws from each plate should ideally cross to engage the opposite column. I confirm articular step-off less than 1 mm, normal carrying angle, and absence of screws in the fossae on fluoroscopy, then perform full passive range-of-motion testing on the table. The olecranon is reattached anatomically using tension band wiring guided by the pre-placed K-wires. Finally, I perform anterior subcutaneous transposition of the ulnar nerve and close in layers. Post-operatively, physiotherapy commences at 48 hours and indomethacin 25 mg three times daily is started for 6 weeks to reduce heterotopic ossification risk.
CLINICAL SCENARIOAdvanced

CLINICAL PROMPT

"A 72-year-old woman with osteoporosis sustains an AO C3 distal humerus fracture. How do you decide between ORIF and primary total elbow replacement?"

PRACTICAL APPROACH
This is a common and important decision-making scenario in elbow trauma. The key factors I weigh are age, bone quality, fracture complexity, functional demand, and the evidence base. For this 72-year-old woman with osteoporosis and an AO C3 fracture, primary total elbow replacement is a strong consideration and is supported by level-1 evidence. The landmark study is McKee and colleagues (J Bone Joint Surg Am 2009), who randomised patients older than 65 with C-type distal humerus fractures to ORIF versus TER. TER produced significantly better Mayo Elbow Performance Scores at 2 years (86 versus 73); DASH was better in the short term but not significantly different at 2 years. The reoperation rate was 27% for ORIF versus 12% for TER, which did not reach statistical significance, but critically, a quarter of patients randomised to ORIF were found to be unreconstructable and were converted to TER on the table. Cobb and Morrey (J Bone Joint Surg Am 1997) also demonstrated uniformly good or excellent results with primary TER in 20 elderly patients with comminuted fractures. However, TER is not without drawbacks: it carries a strict 2 kg lifting restriction for life, is subject to polyethylene bushing wear and loosening, and has a 5–10% complication rate including infection and aseptic loosening. Revision of a failed TER is technically very difficult. My decision algorithm: if the fracture is unreconstructable on CT (marked comminution, osteoporotic fragmentation, inability to restore articular congruity), and the patient is older than 65 and physiologically elderly, I would perform primary TER using a semiconstrained implant (Coonrad-Morrey or GSB type). The surgical approach is the same — posterior midline, ulnar nerve identification and transposition — but instead of osteotomy and ORIF, the distal humerus is resected at the supracondylar ridges and the prosthesis inserted. If I were to attempt ORIF in this patient and it failed, revision to TER through a scarred, hardware-laden field is a very difficult salvage procedure. If there is any doubt about reconstructability, I err toward TER. I would always discuss both options with the patient pre-operatively and document informed consent.
CLINICAL SCENARIOAdvanced

CLINICAL PROMPT

"A patient returns to your clinic 6 months after distal humerus ORIF with a flexion arc of only 40–90 degrees (50-degree arc). How do you manage this?"

PRACTICAL APPROACH
Post-operative stiffness following distal humerus ORIF is the commonest complication, with 20–30% of patients achieving a functionally suboptimal arc. A 50-degree arc (40–90 degrees) is significantly below the functional threshold of 30–130 degrees described by Morrey. My management is systematic. First, I would take a careful history: Was early physiotherapy commenced promptly? Is there pain limiting motion? Has the arc improved, plateaued, or deteriorated? I would then examine for: restricted flexion versus extension versus both, crepitus (suggesting articular incongruity or loose bodies), hardware prominence, and ulnar nerve function. I would obtain plain radiographs to confirm fracture union, implant position, and screw lengths, and a CT scan to assess for heterotopic ossification (location, maturity, and relationship to the neurovascular structures), articular congruity, and whether screws are impinging in the fossae. At 6 months with a 50-degree arc, the first-line management is supervised intensive physiotherapy with dynamic elbow extension and flexion splinting for a further 6 months — many patients can gain 20–30 additional degrees with aggressive splinting between 6 and 12 months. I would also consider whether HO prophylaxis was given and document this. If at 12–18 months the arc remains less than 70 degrees, the patient is motivated, fracture union is confirmed, and HO is quiescent on bone scan, surgical intervention is appropriate. Options include: open capsular release (anterior and posterior) combined with removal of impinging hardware and debridement of HO. If a semiconstrained hinge is required (severe destruction), conversion to TER can be considered in selected cases. I quote the principle: never operate on an elbow for stiffness before 12 months from injury without documented plateau and quiescent HO.

Distal Humerus ORIF — Exam Day Summary

Clinical summary

Evidence Base

TER versus ORIF for intra-articular distal humeral fractures in the elderly — multicentre RCT

1
McKee MD, Veillette CJ, Hall JA, Schemitsch EH, et al. • J Shoulder Elbow Surg (2009)
Clinical Implication: In physiologically elderly patients (age greater than 65) with comminuted fractures not amenable to stable internal fixation, primary TER yields more predictable functional outcomes. Approximately a quarter of fractures intended for ORIF prove unreconstructable on the table — counsel and consent for both options.
Verify on PubMed (PMID 18823799)

Total elbow arthroplasty as primary treatment for distal humeral fractures in elderly patients

4
Cobb TK, Morrey BF • J Bone Joint Surg Am (1997)
Clinical Implication: First established primary TER as a valid option for severely comminuted distal humerus fractures in older patients — explicitly stated NOT to be an alternative to osteosynthesis in younger patients.
Verify on PubMed (PMID 9199378)

Complex distal humeral fractures: internal fixation with a principle-based parallel-plate technique

4
Sanchez-Sotelo J, Torchia ME, O'Driscoll SW • J Bone Joint Surg Am (2007)
Clinical Implication: Defines the modern parallel-plating philosophy. Strong distal fixation permits early intensive rehabilitation, which is the single most important factor for restoring elbow motion.
Verify on PubMed (PMID 17473132)

Biomechanical evaluation of parallel versus orthogonal plate fixation of intra-articular distal humerus fractures

5
Zalavras CG, Vercillo MT, Jun BJ, Itamura JM, Lee TQ, et al. • J Shoulder Elbow Surg (2011)
Clinical Implication: Parallel plating is biomechanically advantageous, particularly when there is metaphyseal comminution. Both configurations remain clinically acceptable; choice is guided by fracture pattern, soft-tissue access and surgeon experience.
Verify on PubMed (PMID 21134662)

Biomechanical evaluation of methods of internal fixation of the distal humerus

3
Schemitsch EH, Tencer AF, Henley MB • J Orthop Trauma (1994)
Clinical Implication: Underpins the bicolumnar principle: each column must carry its own plate. Refutes the notion that strict 90-degree (perpendicular) orientation is mandatory for rigidity.
Verify on PubMed (PMID 7869160)

References

  1. McKee MD, Veillette CJ, Hall JA, Schemitsch EH, et al. A multicenter, prospective, randomized, controlled trial of open reduction—internal fixation versus total elbow arthroplasty for displaced intra-articular distal humeral fractures in elderly patients. J Shoulder Elbow Surg. 2009;18(1):3-12. doi:10.1016/j.jse.2008.06.005 (PMID 18823799)

    • Level-1 RCT: TER produced significantly better Mayo Elbow Performance Scores than ORIF at 2 years in patients older than 65; reoperation 27% ORIF versus 12% TER (not statistically significant). 24% of ORIF cases were unreconstructable and converted to TER intraoperatively.

  2. Cobb TK, Morrey BF. Total elbow arthroplasty as primary treatment for distal humeral fractures in elderly patients. J Bone Joint Surg Am. 1997;79(6):826-832. doi:10.2106/00004623-199706000-00004 (PMID 9199378)

    • Landmark series: 20 patients (21 elbows), all good or excellent Mayo Elbow Performance Scores with primary TER for comminuted distal humerus in elderly; established TER as a valid primary option, not a substitute for ORIF in the young.

  3. Pajarinen J, Bjorkenheim JM. Operative treatment of type C intercondylar fractures of the distal humerus: results after a mean follow-up of 2 years in a series of 18 patients. J Shoulder Elbow Surg. 2002;11(1):48-52. doi:10.1067/mse.2002.119389

    • Outcomes of AO C-type distal humerus fractures with bicolumnar ORIF; satisfactory outcomes with appropriate technique including olecranon osteotomy approach.

  4. Schemitsch EH, Tencer AF, Henley MB. Biomechanical evaluation of methods of internal fixation of the distal humerus. J Orthop Trauma. 1994;8(6):468-475. (PMID 7869160)

    • Cadaver study: two plates on separate columns and different surfaces provide rigid fixation; strict 90-degree (perpendicular) orientation is not required for adequate rigidity.

  5. Sanchez-Sotelo J, Torchia ME, O'Driscoll SW. Complex distal humeral fractures: internal fixation with a principle-based parallel-plate technique. J Bone Joint Surg Am. 2007;89(5):961-969. doi:10.2106/JBJS.E.01311 (PMID 17473132)

    • Landmark parallel-plating series: 34 fractures, union in 31 of 32, mean MEPS 85; defines the modern principle-based technique maximising distal articular fixation.

  6. Zalavras CG, Vercillo MT, Jun BJ, Otarodifard K, Itamura JM, Lee TQ. Biomechanical evaluation of parallel versus orthogonal plate fixation of intra-articular distal humerus fractures. J Shoulder Elbow Surg. 2011;20(1):12-20. doi:10.1016/j.jse.2010.08.005 (PMID 21134662)

    • Matched-pair cadaver study: parallel constructs significantly stiffer in varus and stronger to failure than orthogonal, with no posterior-plate screw loosening.

  7. Huang TL, Chiu FY, Chuang TY, Chen TH. The results of open reduction and internal fixation in elderly patients with severe fractures of the distal humerus: a critical analysis of the results. J Trauma. 2005;58(1):62-69. doi:10.1097/01.ta.0000114082.61003.5f

    • Series demonstrating high complication rates (stiffness, HO, non-union) with ORIF in elderly, supporting TER as preferred option in this population.

  8. Morrey BF, Askew LJ, Chao EY. A biomechanical study of normal functional elbow motion. J Bone Joint Surg Am. 1981;63(6):872-877. (PMID 7240327)

    • Classic study establishing the functional arc of the elbow: 100 degrees of flexion (30–130 degrees) and 100 degrees of forearm rotation (50 degrees pronation, 50 degrees supination) accomplish most activities of daily living.

  9. Wiggers JK, Gottschalk MB, Milam RA, Hsu JE, Waters PM, Bae DS. Operative treatment of distal humeral fractures. J Bone Joint Surg Rev. 2015;3(4). doi:10.2106/JBJS.RVW.N.00091

    • Contemporary review of ORIF technique, implant options, and outcomes; confirms bicolumnar plating as gold standard for C-type fractures.

  10. Clavert P, Ducrot G, Sirveaux F, Mole D, Kempf JF. Outcomes of distal humerus fractures managed by plating in patients above 60 years old. Orthop Traumatol Surg Res. 2013;99(7):771-777. doi:10.1016/j.otsr.2013.08.004

    • Series in elderly patients demonstrating acceptable ORIF outcomes when adequate fixation is achieved, but identifying predictors of failure that support TER selection criteria.